Question 1121753
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<pre>
The expression under the square root must be non-negative


9 - x^2 >= 0,   or


9 >= x^2,    which implies


-3 <= x <= 3.


<U>Answer</U>.  The domain is the set  { -3 <= x <= 3},   or in the interval notation,  [-3,3].
</pre>

Solved.


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For many other similar solved problem see the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Functions/Finding-domain-of-a-function.lesson>Domain of a function which involves a quadratic polynomial under the square root operator</A>,

in this site.